True enough, nigrunze, but what he means is that since every Apple computer comes with OS X, each subsequent release of a new OS X version is essentially an upgrade to what you already have. You are correct though, that there's always ever only one version of an OS X release, and that's the full version!
My two cents here would be that OSX and Apple hardware sell each other because they are only sold with each other. The same goes for iLife and Apple computers. They sell each other because they only are sold with each other. Obviously, one can disagree with that point of view, but I think that's the perspective Apple has. That, along with the exclusivity of the Apple experience were chief reasons for my switch in 2002 after using Macs in college.
My two cents here would be that OSX and Apple hardware sell each other because they are only sold with each other. The same goes for iLife and Apple computers. They sell each other because they only are sold with each other. Obviously, one can disagree with that point of view, but I think that's the perspective Apple has. That, along with the exclusivity of the Apple experience were chief reasons for my switch in 2002 after using Macs in college.